Step-through bathtub insert



FIG. 1 is a top plan view of said bathtub insert;

FIG. 2 is an elevated front view thereof;

FIG. 3 is an elevated back view thereof;

FIG. 4 is an elevated right end view thereof, the left end being a mirror image of the right side; and,

FIG. 5 is bottom plan view of said bathtub insert. 

I claim the ornamental design for the step-through bathtub insert, as shown and described. 